feat: parse travel guide per date

src/BusProNet/Model/Travel.php

@@ -73,6 +73,9 @@ class Travel
     #[Groups(['api:single'])]
     public bool $participantCountMutable = true;
 
+    #[Groups(['api:single'])]
+    public ?Guide $guide = null;
+
     public function getAdditionalServicesByGroup(mixed $group, bool $availableOnly = true): array
     {
         $group = (array) $group;